Left 4 Dead 2 - Update

Fixed the game and tools not launching on machines with 16+ CPUs.

Fixed missing and incorrect music being played in the L4D1 campaigns

Swamp Fever - The Swamp: Added additional self-terminating survivor-only blockers to the areas above the airplane wreckage to prevent players from skipping the airplane event. These blockers are killed once the airplane door is opened.

Cold Stream South Pine Stream: Added a small blocker next to a crate near the military truck near mid-level to resolve a minor stuck spot.

Fixed controller navigation in mutation menus